Plant & Animal Genome V Conference
Town & Country Hotel, San Diego, CA, January 12-16, 1997.
PAG-V: W40 - MAPPING GENES FOR DAY NEUTRAL FLOWERING HABIT IN STRAWBERRY
W40
MAPPING GENES FOR DAY NEUTRAL FLOWERING HABIT IN STRAWBERRY
DAVIS, THOMAS M.
226. Plant Biology Dept., Rudman Hall, University of New Hampshire, Durham, NH 03824
Strawberries (Fragaria sp.) are either short day (SD) or day neutral (DN) in their flowering habit. The SD, or 'seasonal-bearing', habit is the predominant form, and is characteristic of most wild strawberries and 95% of commercial (Fragaria x ananassa) cultivars. Conflicting reports have appeared regarding the modes of inheritance of the DN habit in different strawberry species. We have identified molecular markers for, and have mapped, a recessive gene conferring DN flowering habit in a diploid (2N=2X=14) species, F. vesca. The SD:DN segregation ratios in the F2 mapping population and derived tescross progenies are highly skewed in favor of the DN trait. An F. x ananassa mapping population is being utilized in a search for molecular markers linked to a putative dominant gene conferring DN flowering habit in the octoploid (2N=8X=56), cultivated strawberry.